CN108418236A - A kind of flexibility multimode switch AC fault ride-through method - Google Patents
A kind of flexibility multimode switch AC fault ride-through method Download PDFInfo
- Publication number
- CN108418236A CN108418236A CN201810129249.0A CN201810129249A CN108418236A CN 108418236 A CN108418236 A CN 108418236A CN 201810129249 A CN201810129249 A CN 201810129249A CN 108418236 A CN108418236 A CN 108418236A
- Authority
- CN
- China
- Prior art keywords
- fault
- switch
- area
- multimode switch
- transverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention discloses a kind of flexible multimode switch AC fault ride-through methods.In the case of transless, the overvoltage caused by zero-sequence component seriously affects flexible multimode switch with the AC distribution net generation that overcurrent can switch and be connected to flexible multimode.The present invention includes：After AC fault occurs, using distribution network line protective device, determine that position occurs for failure, and fault location information is sent to flexible multimode and is switched；After flexible multimode switch receives fault message, the wire-outgoing breaker to failure for the feeder line that is connected with flexible multimode switch in area issues open command；After wire-outgoing breaker disconnects, Passive Shape Control operating status is switched to from Active control operating status with failure in flexible multimode switch for the transverter that area is connected；Troubles inside the sample space and external area error are respectively processed.The invention enables transformerless flexible multimode switches to have AC fault ride-through capability, ensures the operation steady in a long-term of ac and dc systems.
Description
Technical field
The invention belongs to flexible electric control technology field, specifically a kind of AC fault of flexible multimode switch
Traversing method.
Background technology
Currently, with the access of the novel loads such as the novel power supplies such as photovoltaic, wind-powered electricity generation and electric vehicle, electricity in power distribution network
Phenomena such as pressing out-of-limit fluctuation, feeder line power imbalances is on the rise.Conventional control means（Such as switched capacitor, grid switching operation）Nothing
Method effectively solves problem above.Flexible multimode switch uses power electronics new technology, can accurately control its connected feeder line
Active power and reactive power, be also equipped with power quality controlling function, distributed generation resource can be successfully managed and load is brought
Randomness and a series of problems for being brought to power distribution network of fluctuation.
The converter structures such as cross-straight-intersection can be used, directly hands in flexible multimode switch, but from presently relevant equipment
Manufacturing process from the point of view of, with voltage source converter（Voltage source converter, VSC）Headed by cross-straight-intersection become
Change technology more mature economy.VSC generally uses are coupled transformer and exchanges connected, and alternating current-direct current system may be implemented in connection transformer
The Fault Isolation of system improves the reliability of system operation.But the configuration for being coupled transformer will make flexible multimode switch
Cost and occupation of land increase considerably.Flexible multimode switch is generally closer from city load center, and nervous land resource pair is set
Standby compact design requirement is higher, and therefore, flexible multimode switch goes the mode of transformer that can preferably agree with its application
The demand of occasion.
Flexible multimode switch in the case of transless, the zero-sequence component of AC distribution net cannot by naturally every
From zero-sequence component will be switched from a failure for block transitive to other power distribution networks by flexible multimode normally for area so that therefore
The coverage of barrier greatly increases.When singlephase earth fault occurs for the side AC distribution net of flexible multimode switch, exchange
The zero-sequence component of side can appear in DC side in the form of common mode, and the transverter of non-faulting side is transferred to by DC bus, non-
Failure AC system will appear the feature of similar failure, generate residual voltage.Overvoltage caused by the zero-sequence component and excessively electric
Stream has a direct impact the AC distribution net that flexible multimode is switched and is connected, and needs that certain measure is taken to be pressed down
System.
Invention content
The existing above problem after removing transformer is switched for flexible multimode, a kind of flexible multimode of present invention offer is opened
The AC fault traversing method of pass, effectively to inhibit the generation and transmission of zero-sequence component so that transformerless flexibility multimode
Switch has AC fault ride-through capability, ensures the operation steady in a long-term of ac and dc systems.
For this purpose, the present invention adopts the following technical scheme that：A kind of flexibility multimode switch AC fault ride-through method, it is described
Flexible multimode switch be connected for area with multiple power distribution networks, and positioned at each feed line end, centre without connection transformer；With
Range where feeder line and flexible multimode switch itself that flexible multimode switch is connected directly is known as in area, power distribution network remaining
Part is known as outside area；
The AC fault traversing method includes the following steps：
1）After AC fault occurs, using distribution network line protective device, determine that position occurs for failure, and by fault location information
It is sent to flexible multimode switch；
2）After flexible multimode switch receives fault message, to failure going out for the feeder line that is connected with flexible multimode switch in area
Line breaker issues open command；
3）After wire-outgoing breaker disconnects, shape is run from Active control with failure in flexible multimode switch for the transverter that area is connected
State is switched to Passive Shape Control operating status；
If failure is happened in area, following steps are carried out：
4）Current limiting pressure-limiting pattern is opened while being switched to Passive Shape Control for the transverter that area is connected with failure；
5）After transverter is switched to Passive Shape Control, flexible multimode switch is according to fault location information, by distance on faulty line
The nearest both sides on-load switch in fault point disconnects, by Fault Isolation；
6）After completing Fault Isolation, transverter releases pressure-limit current-limit pattern, continues in a manner of Passive Shape Control to abort situation and soft
Property multimode switch between load power supply；At the same time, flexible multimode switchs to wire-outgoing breaker and sends close command；
7）Wire-outgoing breaker is completed after being closed, and the load between abort situation and breaker is powered by power distribution network, so far, completes area
Interior AC fault passes through, and system is restored to stablize；
If failure is happened at outside area, following steps are carried out：
8）It is chronically at passive operating status for the transverter that area is connected with failure, is that wire-outgoing breaker and flexible multimode switch
Between based model for load duration power supply；If fault point is isolated by power distribution network, flexible multimode is switched to send to wire-outgoing breaker and is closed
Instruction；
9）Wire-outgoing breaker is completed after being closed, and the transverter being connected for area with failure switchs to active determine power control from Passive Shape Control
System so far is completed to exchange fault traversing outside area, system is restored to stablize.
Further, in the step 1), the distribution line protection device has overcurrent protection function and in area
Current differential protection function, to ensure the accurate positionin of troubles inside the sample space.
Further, step 3）In, if the transverter be constant DC voltage control station, the transverter be switched to it is passive
Before control, sequence is taken over according to the transverter DC voltage arranged in advance, by other transverter take over DC voltage controls.
Further, step 4）In, by fault current limitation in 1.1pu and hereinafter, residual voltage be limited to 0.2pu and with
Under.
Further, step 3) and 9）In, in the differentiation of feeder line active passive state, to increase the accurate of condition discrimination
Property, safeguards system is smooth active passive switch transition, on the basis of existing active passive state monitoring method, introduces
The division position of wire-outgoing breaker carries out condition discrimination as auxiliary signal.
Further, in step 4), the pressure-limit current-limit pattern under the Passive Shape Control state refers to, in outer voltage
Amplitude limit link is added in output element, to realize current limliting purpose；In current inner loop, increase residual voltage controlling unit, to realize
Pressure limiting purpose.
Further, flexible multimode switch includes multiple converters connected by back-to-back form, transformation
Device uses voltage source converter topological structure；Under normal circumstances, in flexible multimode switch, only there are one transverters
In constant DC voltage control state, remaining transverter all uses constant dc power control.
Further, the voltage source converter uses two level VSC, three level VSC, the modular multilevel change of current
One or more mixing in device MMC.
The device have the advantages that as follows：
1) the case where transless flexibility multimode that the present invention is based on is switched compared to transformer is used, cost of investment is more
Low, floor space smaller can further promote flexible multimode switch in the application in city load center area, and further
Promote the development of flexible multimode switch.
2) the AC fault traversing method of the flexible multimode switch of the present invention, can fast and effeciently inhibit in a short time
For exchanging DC voltage fluctuation that unbalanced fault caused in area, normally for area's AC voltage fluctuations and zero sequence over-current phenomenon avoidance,
In a certain range by the limitation of failure influence area, power distribution network safe and stable operation ability is effectively promoted, improves power distribution network power supply
Reliability.
Description of the drawings
Fig. 1 is the system wiring schematic diagram of flexible multimode switch in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of three classes VSC topologys in the embodiment of the present invention；
Fig. 3 is the flow diagram of AC fault traversing method in the embodiment of the present invention.
Specific implementation mode
In order to more specifically describe the present invention, with reference to the accompanying drawings of the specification and specific implementation mode is to skill of the invention
Art scheme and its relative theory are described in detail.
Transless flexibility multimode switch as shown in Figure 1（FMSS）Comprising it is multiple directly to be connected by DC bus
The converter connect, affiliated converter number are built according to need, are more than or equal to 2.Flexible multimode switch can connect same
For a plurality of feeder line in area, multiple and different a plurality of feeder lines in area can be also connected, and be typically connected to the end of each feed line.
Each current conversion station is directly connected with AC distribution net, intermediate without connection transformer.Matched by the power coordination between converter
It closes, it is same/different to turn to supply for the real-time of achievable power between the feeder line in area, meanwhile, place feeder line is adjusted and for area
The power qualities characteristic such as voltage and current.
Flexibility multimode switch shown in FIG. 1 includes 3 converters, is connected to 3 feeder terminals in 3 areas Ge Gong.S11、
S12, S13, S14 are the wire-outgoing breaker for power distribution network each feed line in area 1, and S21, S22, S23, S24 are for power distribution network in area 2
There is the wire-outgoing breaker of each feed line fault current to cut off ability.Q11, Q12, Q13, Q14, Q15, Q16, Q17 are for area 1
On-load switch on interior the connected feeder lines of S12 has rated current cut-out ability.Q21, Q22, Q23, Q24, Q25, Q26, Q27 are
For the on-load switch in area 2 on the connected feeder lines of S22, has rated current cut-out ability.S12, S22 and Q11, Q12, Q13,
Q14, Q15, Q16, Q17 and Q21, Q22, Q23, Q24, Q25, Q26, Q27 are switched by flexible multimode and are controlled.With flexible more shapes
Three connected feeder lines of state switch and flexible multimode switch itself are called range in area, and other parts are called range outside area, main
It is used for the identification of failure subregion.
The converter of flexible multimode switch can be used cross-straight-intersection, directly hand over the structures such as friendship, but be set from presently relevant
From the point of view of standby manufacturing process, with voltage source converter（Voltage source converter, VSC）Headed by cross-straight-intersection
Converter technique more mature economy.Fig. 2 gives two level VSC (Fig. 2 a), three level VSC (Fig. 2 b) and modular multilevel and changes
Flow device（Modular multilevel converter, MMC）The topological structure of (Fig. 2 c).Each change of flexible multimode switch
Same converter structure may be used in parallel operation, can also select the combining form of a variety of transverters according to actual needs.
Fig. 3 is the AC fault traversing method of transless flexibility multimode switch, is included the following steps：
1）After AC fault occurs, using distribution network line protective device, determine that position occurs for failure, and by fault location information
It is sent to flexible multimode switch.
2）After flexible multimode switch receives fault message, to failure for the feedback that in area, is connected with flexible multimode switch
The wire-outgoing breaker of line issues open command.For example, if shown in FIG. 1 break down for area 1, then to wire-outgoing breaker S12
Send open command；If breaking down for area 2, then open command is sent to wire-outgoing breaker S22.
3）After wire-outgoing breaker disconnects, transported from Active control for the transverter that area is connected with failure in flexible multimode switch
Row state is switched to Passive Shape Control operating status, if the transverter is originally used for constant DC voltage control station, which is cutting
Before being changed to Passive Shape Control, by other transverter take over DC voltage controls, ensure the DC voltage of flexible multimode switch itself
Stablize.
Following steps and failure be happened in area or area outside it is related, need to describe respectively.In view of either for 1 event of area
Barrier is still for 2 failure of area, and the mechanism of flexible multimode switch AC fault traversing is consistent, therefore, below with shown in FIG. 1
For being illustrated for the failure F1 and F2 in area 1.According to definition before, F1 belongs to troubles inside the sample space, and F2 belongs to external area error.
If breaking down at F1, i.e. troubles inside the sample space：
4）With failure for area（For area 1）Connected transverter should open current limiting pressure-limiting pattern while being switched to Passive Shape Control,
It will be for the fault current limitation in area 1 is in 1.1pu and hereinafter, residual voltage is limited to 0.2pu and following.
5）After transverter is switched to Passive Shape Control, flexible multimode switch, will be on faulty line according to fault location information
The nearest both sides on-load switch of distance fault point（Q12 and Q13）It disconnects, by Fault Isolation.
6）After completing Fault Isolation, transverter releases pressure-limit current-limit pattern, continues in a manner of Passive Shape Control to abort situation
Load power supply between flexible multimode switch；At the same time, flexible multimode is switched to send to wire-outgoing breaker S12 and is closed
Instruction.
7）Wire-outgoing breaker S12 is completed after being closed, and the load between abort situation and breaker is continued to power by power distribution network,
So far, it completes AC fault in area to pass through, system is restored to stablize.
If breaking down at F2, i.e. external area error：
8）It can be chronically at passive operating status for the transverter that area is connected with failure, be that wire-outgoing breaker S12 and flexibility are more
Based model for load duration power supply between status switch.If fault point is isolated by power distribution network, flexible multimode is switched to wire-outgoing breaker
S12 sends close command.
9）Wire-outgoing breaker S12 is completed after being closed, and it is active fixed that the transverter being connected for area with failure switchs to from Passive Shape Control
Power control so far is completed to exchange fault traversing outside area, system is restored to stablize.
It should be noted that in step 1), on the one hand distribution line protection device includes conventional electrical distribution line direction mistake
It flows defencive function and on the other hand in area in range, is also configured with current differential protection, to ensure the accurate fixed of troubles inside the sample space
Position.
Step 3) and 9）In, Active control turns Passive Shape Control strategy and Passive Shape Control turns Active Control Strategy and uses existing control
Technology processed, but in the differentiation of feeder line active passive state, to increase the accuracy of condition discrimination, safeguards system is in active passive
Switch transition it is smooth, on the basis of existing active passive state monitoring method, introduce the division position of wire-outgoing breaker
Condition discrimination is carried out as auxiliary signal.
In step 4), the pressure-limit current-limit pattern under Passive Shape Control state refers to that limit is added in the output element of outer voltage
Width link, to realize current limliting purpose；In current inner loop, increase residual voltage controlling unit, to realize pressure limiting purpose.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, the application can be used in one or more wherein include computer usable program code computer
Usable storage medium（Including but not limited to magnetic disk storage, CD-ROM, optical memory etc.）The computer program of upper implementation produces
The form of product.
The application is with reference to method, the equipment according to the embodiment of the present application（System）And the flow of computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.For a person skilled in the art, after reading above description, respectively
Kind variations and modifications undoubtedly will be evident.Therefore, appended claims should regard the true intention for covering the present invention as
With whole variations and modifications of range.The range and content of any and all equivalences, are all considered as in Claims scope
It still belongs to the intent and scope of the invention.
Claims (8)
1. a kind of flexibility multimode switch AC fault ride-through method, flexible multimode switch is with multiple power distribution networks for area
It is connected, and positioned at the end of each feed line, it is intermediate without connection transformer；With the flexible multimode feeder line that is connected directly of switch and soft
Property multimode switch itself where range be known as in area, power distribution network rest part is known as outside area；
The AC fault traversing method includes the following steps：
1) after AC fault occurs, using distribution network line protective device, determine that position occurs for failure, and by fault location information
It is sent to flexible multimode switch；
2) after flexible multimode switch receives fault message, to failure going out for the feeder line that is connected with flexible multimode switch in area
Line breaker issues open command；
3) after wire-outgoing breaker disconnects, shape is run from Active control with failure in flexible multimode switch for the transverter that area is connected
State is switched to Passive Shape Control operating status；
If failure is happened in area, following steps are carried out：
4) current limiting pressure-limiting pattern is opened while being switched to Passive Shape Control for the transverter that area is connected with failure；
5) after transverter is switched to Passive Shape Control, flexible multimode switch is according to fault location information, by distance on faulty line
The nearest both sides on-load switch in fault point disconnects, by Fault Isolation；
6) after completing Fault Isolation, transverter releases pressure-limit current-limit pattern, continues in a manner of Passive Shape Control to abort situation and soft
Property multimode switch between load power supply；At the same time, flexible multimode switchs to wire-outgoing breaker and sends close command；
7) wire-outgoing breaker is completed after being closed, and the load between abort situation and breaker is powered by power distribution network, so far, completes area
Interior AC fault passes through, and system is restored to stablize；
If failure is happened at outside area, following steps are carried out：
8) it is chronically at passive operating status for the transverter that area is connected with failure, is that wire-outgoing breaker and flexible multimode switch
Between based model for load duration power supply；If fault point is isolated by power distribution network, flexible multimode is switched to send to wire-outgoing breaker and is closed
Instruction；
9) wire-outgoing breaker is completed after being closed, and the transverter being connected for area with failure switchs to active determine power control from Passive Shape Control
System so far is completed to exchange fault traversing outside area, system is restored to stablize.
2. flexibility multimode switch AC fault ride-through method according to claim 1, which is characterized in that the step
1) in, the distribution line protection device has the function of overcurrent protection function and the current differential protection in area.
3. flexibility multimode switch AC fault ride-through method according to claim 1, which is characterized in that in step 3),
If the transverter is constant DC voltage control station, the transverter is before being switched to Passive Shape Control, according to the change of current arranged in advance
Device DC voltage takes over sequence, by other transverter take over DC voltage controls.
4. flexibility multimode switch AC fault ride-through method according to claim 1, it is characterised in that：In step 4),
By fault current limitation is in 1.1pu and hereinafter, residual voltage is limited to 0.2pu and following.
5. flexibility multimode switch AC fault ride-through method according to claim 1, it is characterised in that：The step
And 9) 3) in, in the differentiation of feeder line active passive state, to increase the accuracy of condition discrimination, safeguards system is in active passive
Switch transition it is smooth, on the basis of existing active passive state monitoring method, introduce wire-outgoing breaker division position make
Condition discrimination is carried out for auxiliary signal.
6. flexibility multimode switch AC fault ride-through method according to claim 1, it is characterised in that：The step
4) in, the pressure-limit current-limit pattern under the Passive Shape Control state refers to that amplitude limit link is added in the output element of outer voltage；
In current inner loop, increase residual voltage controlling unit.
7. flexibility multimode switch AC fault ride-through method according to claim 1, it is characterised in that：The flexibility
Multimode switch includes multiple converters connected by back-to-back form, and converter uses voltage source converter topology knot
Structure；Under normal circumstances, in flexible multimode switch, it only is in constant DC voltage control state there are one transverter,
Remaining transverter all uses constant dc power control.
8. flexibility multimode switch AC fault ride-through method according to claim 7, it is characterised in that：The voltage
Source type transverter uses one or more mixing in two level VSC, three level VSC, modularization multi-level converter MMC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129249.0A CN108418236B (en) | 2018-02-08 | 2018-02-08 | Flexible multi-state switch alternating current fault ride-through method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810129249.0A CN108418236B (en) | 2018-02-08 | 2018-02-08 | Flexible multi-state switch alternating current fault ride-through method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108418236A true CN108418236A (en) | 2018-08-17 |
| CN108418236B CN108418236B (en) | 2019-12-17 |
Family
ID=63128158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810129249.0A Active CN108418236B (en) | 2018-02-08 | 2018-02-08 | Flexible multi-state switch alternating current fault ride-through method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108418236B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149985A (en) * | 2018-09-29 | 2019-01-04 | 阳光电源（上海）有限公司 | Modularization cascade multilevel converter and its system controller and control method |
| CN109586306A (en) * | 2018-12-24 | 2019-04-05 | 华北电力大学 | A kind of distribution network voltage fluctuation suppressing method based on flexible multimode switch |
| CN110763950A (en) * | 2019-09-17 | 2020-02-07 | 华中科技大学 | Flexible multi-state switch single-phase earth fault ride-through control method |
| CN111371092A (en) * | 2020-04-08 | 2020-07-03 | 广东电网有限责任公司电力调度控制中心 | Automatic control method, device, equipment and storage medium for self-healing of power distribution network |
| WO2020141389A1 (en) * | 2018-12-31 | 2020-07-09 | Abb Schweiz Ag | Fault mitigation system for medium voltage alternating current mvac distribution network |
| CN113872243A (en) * | 2021-11-02 | 2021-12-31 | 国网浙江省电力有限公司电力科学研究院 | Alternating current fault ride-through method of wind power low-frequency sending-out system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597217A (en) * | 2016-11-28 | 2017-04-26 | 华北电力大学 | MMC-HVDC alternating current side asymmetric fault diagnosis method |
| CN107394819A (en) * | 2017-08-24 | 2017-11-24 | 上海交通大学 | Flexible interconnection system and its control method between a kind of transformer station's low-voltage bus bar |
| CN107612012A (en) * | 2017-08-16 | 2018-01-19 | 国网浙江省电力公司电力科学研究院 | A kind of transformerless intelligent Sofe Switch and its AC fault traversing method and system |
-
2018
- 2018-02-08 CN CN201810129249.0A patent/CN108418236B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106597217A (en) * | 2016-11-28 | 2017-04-26 | 华北电力大学 | MMC-HVDC alternating current side asymmetric fault diagnosis method |
| CN107612012A (en) * | 2017-08-16 | 2018-01-19 | 国网浙江省电力公司电力科学研究院 | A kind of transformerless intelligent Sofe Switch and its AC fault traversing method and system |
| CN107394819A (en) * | 2017-08-24 | 2017-11-24 | 上海交通大学 | Flexible interconnection system and its control method between a kind of transformer station's low-voltage bus bar |
Non-Patent Citations (2)
| Title |
|---|
| 周杨等: "单变压器分区互联装置接地故障特性研究及控制保护策略设计", 《中国电机工程学报》 * |
| 郭宝甫等: "三相串联VSC的通用控制策略", 《南方电网技术》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109149985A (en) * | 2018-09-29 | 2019-01-04 | 阳光电源（上海）有限公司 | Modularization cascade multilevel converter and its system controller and control method |
| CN109149985B (en) * | 2018-09-29 | 2020-08-14 | 阳光电源（上海）有限公司 | Modular cascade multilevel converter and system controller and control method thereof |
| CN109586306A (en) * | 2018-12-24 | 2019-04-05 | 华北电力大学 | A kind of distribution network voltage fluctuation suppressing method based on flexible multimode switch |
| CN109586306B (en) * | 2018-12-24 | 2021-11-30 | 华北电力大学 | Power distribution network voltage fluctuation suppression method based on flexible multi-state switch |
| WO2020141389A1 (en) * | 2018-12-31 | 2020-07-09 | Abb Schweiz Ag | Fault mitigation system for medium voltage alternating current mvac distribution network |
| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
| CN110763950A (en) * | 2019-09-17 | 2020-02-07 | 华中科技大学 | Flexible multi-state switch single-phase earth fault ride-through control method |
| CN110763950B (en) * | 2019-09-17 | 2020-09-18 | 华中科技大学 | Flexible multi-state switch single-phase earth fault ride-through control method |
| CN111371092A (en) * | 2020-04-08 | 2020-07-03 | 广东电网有限责任公司电力调度控制中心 | Automatic control method, device, equipment and storage medium for self-healing of power distribution network |
| CN111371092B (en) * | 2020-04-08 | 2022-02-15 | 广东电网有限责任公司电力调度控制中心 | Automatic control method, device, equipment and storage medium for self-healing of power distribution network |
| CN113872243A (en) * | 2021-11-02 | 2021-12-31 | 国网浙江省电力有限公司电力科学研究院 | Alternating current fault ride-through method of wind power low-frequency sending-out system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108418236B (en) | 2019-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108418236A (en) | A kind of flexibility multimode switch AC fault ride-through method | |
| Akhmatov et al. | Technical guidelines and prestandardization work for first HVDC grids | |
| Monadi et al. | Centralized protection strategy for medium voltage DC microgrids | |
| Chaudhuri et al. | Multi-terminal direct-current grids: Modeling, analysis, and control | |
| Beerten et al. | Modeling and control of HVDC grids: A key challenge for the future power system | |
| EP3024109B1 (en) | Valve base control device and method for modular multi-level convertor | |
| Wang et al. | A multi-stage restoration method for medium-voltage distribution system with DGs | |
| US20160254669A1 (en) | Coordinated control of multi-terminal hvdc systems | |
| US9197068B2 (en) | Coordinated control of multi-terminal HVDC systems | |
| CN103378603B (en) | Open-circuit fault detection device, inverter controller, energy conversion system and method | |
| Rahman et al. | Protection of large partitioned MTDC networks using DC-DC converters and circuit breakers | |
| Kontos et al. | Optimization of limiting reactors design for DC fault protection of multi-terminal HVDC networks | |
| KR20170015913A (en) | Fault protection in converter-based dc distribution systems | |
| CN109921388A (en) | The direct current cut-off device and method of hybrid MMC and AC circuit breaker cooperation | |
| Hojjaty et al. | Intelligent protection coordination restoration strategy for active distribution networks | |
| CN105162091B (en) | A kind of Risk assessment of cascading failure in power system method for considering Risk of Information System | |
| Zhang et al. | Real-time power management for microgrids with dynamic boundaries and multiple source locations | |
| CN109921389A (en) | A kind of direct-current grid fault protecting method and system | |
| CN105391033A (en) | Layered domain-partitioned anti-islanding protection method for large-scale wind power generation | |
| CN105391030A (en) | Planned island division method through load gradual loading and aggregation based on network topology structure | |
| Kontos et al. | Effect of power flow control methods on the DC fault response of multi-terminal DC networks | |
| CN106026047A (en) | Optimized control method of high-reliability distribution automation based on multi-source coordination and cooperation | |
| CN108551178A (en) | A kind of electromechanical transient simulation model of flexible direct current power transmission system | |
| CN109994989A (en) | A kind of guard method and system of the flexible direct current power grid based on dc circuit breaker | |
| CN107863776A (en) | Electric energy router group system applied to AC/DC mixed power system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |